Who should use RightClickDefine?

RightClickDefine is a consumer product built for firefox users who frequently look up word definitions.

Does RightClickDefine have a free plan?

Yes — RightClickDefine is free to use.

What platforms does RightClickDefine run on?

RightClickDefine runs on the web and embeddable surfaces.

Is RightClickDefine still active?

Unverified. RightClickDefine has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to RightClickDefine?

Similar projects tracked by PulseGate include Click Define, Quick Define, and Click dictionary.

Who develops RightClickDefine?

RightClickDefine is developed by ttWebExtensions.

When did RightClickDefine launch?

RightClickDefine first shipped in 2020.

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RightClickDefine

Name: RightClickDefine
Author: ttWebExtensions

mozilla.orgBrowser DevTools & extensions

RightClickDefine is a Firefox browser extension that lets users highlight a word, open the context menu, and choose Dictionary.com or Urban Dictionary for a definition. It is intended for people who want faster word lookups while browsing.

FreeWebEmbeddable

Visit mozilla.org

Overview

4 features

RightClickDefine is a Browser DevTools & extensions project. It focuses on looking up word definitions without retyping or navigating away from the current page. RightClickDefine is a consumer product aimed at firefox users who frequently look up word definitions. RightClickDefine costs nothing to use. RightClickDefine is available on the web and embeddable surfaces.

ttWebExtensions builds and maintains RightClickDefine, and it first shipped in 2020. Among its 4 catalogued features are text highlighting, context menu lookup, and dictionary.com lookup. The interface is available in 32 languages, including Czech, German, and Greek.

Summary written by a language model from the project’s public pages.

Text highlighting
Context menu lookup
Dictionary.com lookup
Urban Dictionary lookup

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed15 Sep · 21:47 UTC
RightClickDefine verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about RightClickDefine

What is RightClickDefine?: RightClickDefine focuses on looking up word definitions without retyping or navigating away from the current page. It is catalogued under Browser DevTools & extensions on PulseGate.
Who should use RightClickDefine?: RightClickDefine is a consumer product built for firefox users who frequently look up word definitions.
Does RightClickDefine have a free plan?: Yes — RightClickDefine is free to use.
What platforms does RightClickDefine run on?: RightClickDefine runs on the web and embeddable surfaces.
Is RightClickDefine still active?: Unverified. RightClickDefine has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to RightClickDefine?: Similar projects tracked by PulseGate include Click Define, Quick Define, and Click dictionary.Click Define Quick Define Click dictionary
Who develops RightClickDefine?: RightClickDefine is developed by ttWebExtensions.
When did RightClickDefine launch?: RightClickDefine first shipped in 2020.

At a glance

Pricing: Free
Platforms: Web
First seen: 15 Sep 2026
Built for: Firefox users who frequently look up word definitions
Model: B2C
Solves: Looking up word definitions without retyping or navigating away from the current page.

Registered as

Firefox Add-ons: rightclickdefine

Developer

ttWebExtensions

Index record

Indexed: 15 Sep 2026
Lifecycle: Alive
First seen: Sep 2026
Last seen: 15 Sep 2026

Identity audit (13)

Slug: rightclickdefine-mozilla-org
Lifecycle state recorded: 15 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 15 Sep 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 15 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/rightclickdefine

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